This is an 18k rose gold IWC Aquatimer Chronograph IW376905. It has a black rubber strap (with a spring-loaded lever quick-change system) with an 18k rose gold tang buckle, and a scratch resistant sapphire crystal with anti glare coating. It has round 18k rose gold chronograph push buttons with black rubber rims, a rose gold rubber clad winding crown, and a screw down exhibition sapphire display case with hallmarks. The Flyback function offers instant restarting of the chronograph with a single push of the button with no need to stop and reset the stopwatch. The 44mm diameter solid three-body case, curved lugs, and flat notched unidirectional black and white rotating 60-minute dive bezel with Super Luminova numerals and red 15-minute warning numerals, are polished/brushed. The black geometric "globe-pattern" dial has applied luminous gold-rimmed baton hour markers around a luminous minute scale. It has broad gold baton hands, a center sweep chronograph hand with a red skeletonized arrow tip. There are two recessed black subsidiary dials with luminous white Arabic numerals, including a combined dial with minute and hour chronograph totalizers in a single display with separate red hands at 12 o'clock, and a small running seconds register combined with a date aperture window with red numerals at 6 o'clock. It has a 68-hour power reserve at full wind, and it's water resistant to 120 meters/380 feet. The 15.5mm thick case, dial, and movement are all signed.

This IWC Aquatimer Chronograph IW376905 has a mechanical automatic self-winding in-house IWC caliber 89360 movement. It's rhodium plated with oeil-de-perdrix embellishment, and it's constructed with 40 jewels, a shock absorber device, and a straight-line lever escapement. It includes a monometallic balance that's adjusted to 5 positions, and a self-compensating flat balance spring. It includes a hacking mechanism for precision time setting, and the mechanism oscillates at a frequency of 28,800 vph (4 Hz).

The IWC Aquatimer Chronograph IW376905 was introduced in 2009, and it was produced until 2014.